granicus.if.org Git - postgresql/blob - src/test/regress/regress.c

   1 /*
   2  * src/test/regress/regress.c
   3  */
   4
   5 #include "postgres.h"
   6
   7 #include <float.h>
   8 #include <math.h>
   9
  10 #include "access/transam.h"
  11 #include "access/xact.h"
  12 #include "catalog/pg_type.h"
  13 #include "commands/sequence.h"
  14 #include "commands/trigger.h"
  15 #include "executor/executor.h"
  16 #include "executor/spi.h"
  17 #include "utils/builtins.h"
  18 #include "utils/geo_decls.h"
  19
  20
  21 #define P_MAXDIG 12
  22 #define LDELIM                  '('
  23 #define RDELIM                  ')'
  24 #define DELIM                   ','
  25
  26 extern Datum regress_dist_ptpath(PG_FUNCTION_ARGS);
  27 extern Datum regress_path_dist(PG_FUNCTION_ARGS);
  28 extern PATH *poly2path(POLYGON *poly);
  29 extern Datum interpt_pp(PG_FUNCTION_ARGS);
  30 extern void regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2);
  31 extern Datum overpaid(PG_FUNCTION_ARGS);
  32 extern Datum boxarea(PG_FUNCTION_ARGS);
  33 extern char *reverse_name(char *string);
  34 extern int      oldstyle_length(int n, text *t);
  35 extern Datum int44in(PG_FUNCTION_ARGS);
  36 extern Datum int44out(PG_FUNCTION_ARGS);
  37
  38 #ifdef PG_MODULE_MAGIC
  39 PG_MODULE_MAGIC;
  40 #endif
  41
  42
  43 /*
  44  * Distance from a point to a path
  45  */
  46 PG_FUNCTION_INFO_V1(regress_dist_ptpath);
  47
  48 Datum
  49 regress_dist_ptpath(PG_FUNCTION_ARGS)
  50 {
  51         Point      *pt = PG_GETARG_POINT_P(0);
  52         PATH       *path = PG_GETARG_PATH_P(1);
  53         float8          result = 0.0;   /* keep compiler quiet */
  54         float8          tmp;
  55         int                     i;
  56         LSEG            lseg;
  57
  58         switch (path->npts)
  59         {
  60                 case 0:
  61                         PG_RETURN_NULL();
  62                 case 1:
  63                         result = point_dt(pt, &path->p[0]);
  64                         break;
  65                 default:
  66
  67                         /*
  68                          * the distance from a point to a path is the smallest distance
  69                          * from the point to any of its constituent segments.
  70                          */
  71                         Assert(path->npts > 1);
  72                         for (i = 0; i < path->npts - 1; ++i)
  73                         {
  74                                 regress_lseg_construct(&lseg, &path->p[i], &path->p[i + 1]);
  75                                 tmp = DatumGetFloat8(DirectFunctionCall2(dist_ps,
  76                                                                                                                  PointPGetDatum(pt),
  77                                                                                                           LsegPGetDatum(&lseg)));
  78                                 if (i == 0 || tmp < result)
  79                                         result = tmp;
  80                         }
  81                         break;
  82         }
  83         PG_RETURN_FLOAT8(result);
  84 }
  85
  86 /*
  87  * this essentially does a cartesian product of the lsegs in the
  88  * two paths, and finds the min distance between any two lsegs
  89  */
  90 PG_FUNCTION_INFO_V1(regress_path_dist);
  91
  92 Datum
  93 regress_path_dist(PG_FUNCTION_ARGS)
  94 {
  95         PATH       *p1 = PG_GETARG_PATH_P(0);
  96         PATH       *p2 = PG_GETARG_PATH_P(1);
  97         bool            have_min = false;
  98         float8          min = 0.0;              /* initialize to keep compiler quiet */
  99         float8          tmp;
 100         int                     i,
 101                                 j;
 102         LSEG            seg1,
 103                                 seg2;
 104
 105         for (i = 0; i < p1->npts - 1; i++)
 106         {
 107                 for (j = 0; j < p2->npts - 1; j++)
 108                 {
 109                         regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
 110                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
 111
 112                         tmp = DatumGetFloat8(DirectFunctionCall2(lseg_distance,
 113                                                                                                          LsegPGetDatum(&seg1),
 114                                                                                                          LsegPGetDatum(&seg2)));
 115                         if (!have_min || tmp < min)
 116                         {
 117                                 min = tmp;
 118                                 have_min = true;
 119                         }
 120                 }
 121         }
 122
 123         if (!have_min)
 124                 PG_RETURN_NULL();
 125
 126         PG_RETURN_FLOAT8(min);
 127 }
 128
 129 PATH *
 130 poly2path(POLYGON *poly)
 131 {
 132         int                     i;
 133         char       *output = (char *) palloc(2 * (P_MAXDIG + 1) * poly->npts + 64);
 134         char            buf[2 * (P_MAXDIG) + 20];
 135
 136         sprintf(output, "(1, %*d", P_MAXDIG, poly->npts);
 137
 138         for (i = 0; i < poly->npts; i++)
 139         {
 140                 snprintf(buf, sizeof(buf), ",%*g,%*g",
 141                                  P_MAXDIG, poly->p[i].x, P_MAXDIG, poly->p[i].y);
 142                 strcat(output, buf);
 143         }
 144
 145         snprintf(buf, sizeof(buf), "%c", RDELIM);
 146         strcat(output, buf);
 147         return DatumGetPathP(DirectFunctionCall1(path_in,
 148                                                                                          CStringGetDatum(output)));
 149 }
 150
 151 /* return the point where two paths intersect, or NULL if no intersection. */
 152 PG_FUNCTION_INFO_V1(interpt_pp);
 153
 154 Datum
 155 interpt_pp(PG_FUNCTION_ARGS)
 156 {
 157         PATH       *p1 = PG_GETARG_PATH_P(0);
 158         PATH       *p2 = PG_GETARG_PATH_P(1);
 159         int                     i,
 160                                 j;
 161         LSEG            seg1,
 162                                 seg2;
 163         bool            found;                  /* We've found the intersection */
 164
 165         found = false;                          /* Haven't found it yet */
 166
 167         for (i = 0; i < p1->npts - 1 && !found; i++)
 168         {
 169                 regress_lseg_construct(&seg1, &p1->p[i], &p1->p[i + 1]);
 170                 for (j = 0; j < p2->npts - 1 && !found; j++)
 171                 {
 172                         regress_lseg_construct(&seg2, &p2->p[j], &p2->p[j + 1]);
 173                         if (DatumGetBool(DirectFunctionCall2(lseg_intersect,
 174                                                                                                  LsegPGetDatum(&seg1),
 175                                                                                                  LsegPGetDatum(&seg2))))
 176                                 found = true;
 177                 }
 178         }
 179
 180         if (!found)
 181                 PG_RETURN_NULL();
 182
 183         /*
 184          * Note: DirectFunctionCall2 will kick out an error if lseg_interpt()
 185          * returns NULL, but that should be impossible since we know the two
 186          * segments intersect.
 187          */
 188         PG_RETURN_DATUM(DirectFunctionCall2(lseg_interpt,
 189                                                                                 LsegPGetDatum(&seg1),
 190                                                                                 LsegPGetDatum(&seg2)));
 191 }
 192
 193
 194 /* like lseg_construct, but assume space already allocated */
 195 void
 196 regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
 197 {
 198         lseg->p[0].x = pt1->x;
 199         lseg->p[0].y = pt1->y;
 200         lseg->p[1].x = pt2->x;
 201         lseg->p[1].y = pt2->y;
 202         lseg->m = point_sl(pt1, pt2);
 203 }
 204
 205 PG_FUNCTION_INFO_V1(overpaid);
 206
 207 Datum
 208 overpaid(PG_FUNCTION_ARGS)
 209 {
 210         HeapTupleHeader tuple = PG_GETARG_HEAPTUPLEHEADER(0);
 211         bool            isnull;
 212         int32           salary;
 213
 214         salary = DatumGetInt32(GetAttributeByName(tuple, "salary", &isnull));
 215         if (isnull)
 216                 PG_RETURN_NULL();
 217         PG_RETURN_BOOL(salary > 699);
 218 }
 219
 220 /* New type "widget"
 221  * This used to be "circle", but I added circle to builtins,
 222  *      so needed to make sure the names do not collide. - tgl 97/04/21
 223  */
 224
 225 typedef struct
 226 {
 227         Point           center;
 228         double          radius;
 229 }       WIDGET;
 230
 231 WIDGET     *widget_in(char *str);
 232 char       *widget_out(WIDGET * widget);
 233 extern Datum pt_in_widget(PG_FUNCTION_ARGS);
 234
 235 #define NARGS   3
 236
 237 WIDGET *
 238 widget_in(char *str)
 239 {
 240         char       *p,
 241                            *coord[NARGS],
 242                                 buf2[1000];
 243         int                     i;
 244         WIDGET     *result;
 245
 246         if (str == NULL)
 247                 return NULL;
 248         for (i = 0, p = str; *p && i < NARGS && *p != RDELIM; p++)
 249                 if (*p == ',' || (*p == LDELIM && !i))
 250                         coord[i++] = p + 1;
 251         if (i < NARGS - 1)
 252                 return NULL;
 253         result = (WIDGET *) palloc(sizeof(WIDGET));
 254         result->center.x = atof(coord[0]);
 255         result->center.y = atof(coord[1]);
 256         result->radius = atof(coord[2]);
 257
 258         snprintf(buf2, sizeof(buf2), "widget_in: read (%f, %f, %f)\n",
 259                          result->center.x, result->center.y, result->radius);
 260         return result;
 261 }
 262
 263 char *
 264 widget_out(WIDGET * widget)
 265 {
 266         char       *result;
 267
 268         if (widget == NULL)
 269                 return NULL;
 270
 271         result = (char *) palloc(60);
 272         sprintf(result, "(%g,%g,%g)",
 273                         widget->center.x, widget->center.y, widget->radius);
 274         return result;
 275 }
 276
 277 PG_FUNCTION_INFO_V1(pt_in_widget);
 278
 279 Datum
 280 pt_in_widget(PG_FUNCTION_ARGS)
 281 {
 282         Point      *point = PG_GETARG_POINT_P(0);
 283         WIDGET     *widget = (WIDGET *) PG_GETARG_POINTER(1);
 284
 285         PG_RETURN_BOOL(point_dt(point, &widget->center) < widget->radius);
 286 }
 287
 288 PG_FUNCTION_INFO_V1(boxarea);
 289
 290 Datum
 291 boxarea(PG_FUNCTION_ARGS)
 292 {
 293         BOX                *box = PG_GETARG_BOX_P(0);
 294         double          width,
 295                                 height;
 296
 297         width = Abs(box->high.x - box->low.x);
 298         height = Abs(box->high.y - box->low.y);
 299         PG_RETURN_FLOAT8(width * height);
 300 }
 301
 302 char *
 303 reverse_name(char *string)
 304 {
 305         int                     i;
 306         int                     len;
 307         char       *new_string;
 308
 309         new_string = palloc0(NAMEDATALEN);
 310         for (i = 0; i < NAMEDATALEN && string[i]; ++i)
 311                 ;
 312         if (i == NAMEDATALEN || !string[i])
 313                 --i;
 314         len = i;
 315         for (; i >= 0; --i)
 316                 new_string[len - i] = string[i];
 317         return new_string;
 318 }
 319
 320 /*
 321  * This rather silly function is just to test that oldstyle functions
 322  * work correctly on toast-able inputs.
 323  */
 324 int
 325 oldstyle_length(int n, text *t)
 326 {
 327         int                     len = 0;
 328
 329         if (t)
 330                 len = VARSIZE(t) - VARHDRSZ;
 331
 332         return n + len;
 333 }
 334
 335
 336 static TransactionId fd17b_xid = InvalidTransactionId;
 337 static TransactionId fd17a_xid = InvalidTransactionId;
 338 static int      fd17b_level = 0;
 339 static int      fd17a_level = 0;
 340 static bool fd17b_recursion = true;
 341 static bool fd17a_recursion = true;
 342 extern Datum funny_dup17(PG_FUNCTION_ARGS);
 343
 344 PG_FUNCTION_INFO_V1(funny_dup17);
 345
 346 Datum
 347 funny_dup17(PG_FUNCTION_ARGS)
 348 {
 349         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 350         TransactionId *xid;
 351         int                *level;
 352         bool       *recursion;
 353         Relation        rel;
 354         TupleDesc       tupdesc;
 355         HeapTuple       tuple;
 356         char       *query,
 357                            *fieldval,
 358                            *fieldtype;
 359         char       *when;
 360         int                     inserted;
 361         int                     selected = 0;
 362         int                     ret;
 363
 364         if (!CALLED_AS_TRIGGER(fcinfo))
 365                 elog(ERROR, "funny_dup17: not fired by trigger manager");
 366
 367         tuple = trigdata->tg_trigtuple;
 368         rel = trigdata->tg_relation;
 369         tupdesc = rel->rd_att;
 370         if (TRIGGER_FIRED_BEFORE(trigdata->tg_event))
 371         {
 372                 xid = &fd17b_xid;
 373                 level = &fd17b_level;
 374                 recursion = &fd17b_recursion;
 375                 when = "BEFORE";
 376         }
 377         else
 378         {
 379                 xid = &fd17a_xid;
 380                 level = &fd17a_level;
 381                 recursion = &fd17a_recursion;
 382                 when = "AFTER ";
 383         }
 384
 385         if (!TransactionIdIsCurrentTransactionId(*xid))
 386         {
 387                 *xid = GetCurrentTransactionId();
 388                 *level = 0;
 389                 *recursion = true;
 390         }
 391
 392         if (*level == 17)
 393         {
 394                 *recursion = false;
 395                 return PointerGetDatum(tuple);
 396         }
 397
 398         if (!(*recursion))
 399                 return PointerGetDatum(tuple);
 400
 401         (*level)++;
 402
 403         SPI_connect();
 404
 405         fieldval = SPI_getvalue(tuple, tupdesc, 1);
 406         fieldtype = SPI_gettype(tupdesc, 1);
 407
 408         query = (char *) palloc(100 + NAMEDATALEN * 3 +
 409                                                         strlen(fieldval) + strlen(fieldtype));
 410
 411         sprintf(query, "insert into %s select * from %s where %s = '%s'::%s",
 412                         SPI_getrelname(rel), SPI_getrelname(rel),
 413                         SPI_fname(tupdesc, 1),
 414                         fieldval, fieldtype);
 415
 416         if ((ret = SPI_exec(query, 0)) < 0)
 417                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (insert ...) returned %d",
 418                          when, *level, ret);
 419
 420         inserted = SPI_processed;
 421
 422         sprintf(query, "select count (*) from %s where %s = '%s'::%s",
 423                         SPI_getrelname(rel),
 424                         SPI_fname(tupdesc, 1),
 425                         fieldval, fieldtype);
 426
 427         if ((ret = SPI_exec(query, 0)) < 0)
 428                 elog(ERROR, "funny_dup17 (fired %s) on level %3d: SPI_exec (select ...) returned %d",
 429                          when, *level, ret);
 430
 431         if (SPI_processed > 0)
 432         {
 433                 selected = DatumGetInt32(DirectFunctionCall1(int4in,
 434                                                                                                 CStringGetDatum(SPI_getvalue(
 435                                                                                                            SPI_tuptable->vals[0],
 436                                                                                                            SPI_tuptable->tupdesc,
 437                                                                                                                                                          1
 438                                                                                                                                                 ))));
 439         }
 440
 441         elog(DEBUG4, "funny_dup17 (fired %s) on level %3d: %d/%d tuples inserted/selected",
 442                  when, *level, inserted, selected);
 443
 444         SPI_finish();
 445
 446         (*level)--;
 447
 448         if (*level == 0)
 449                 *xid = InvalidTransactionId;
 450
 451         return PointerGetDatum(tuple);
 452 }
 453
 454 extern Datum ttdummy(PG_FUNCTION_ARGS);
 455 extern Datum set_ttdummy(PG_FUNCTION_ARGS);
 456
 457 #define TTDUMMY_INFINITY        999999
 458
 459 static SPIPlanPtr splan = NULL;
 460 static bool ttoff = false;
 461
 462 PG_FUNCTION_INFO_V1(ttdummy);
 463
 464 Datum
 465 ttdummy(PG_FUNCTION_ARGS)
 466 {
 467         TriggerData *trigdata = (TriggerData *) fcinfo->context;
 468         Trigger    *trigger;            /* to get trigger name */
 469         char      **args;                       /* arguments */
 470         int                     attnum[2];              /* fnumbers of start/stop columns */
 471         Datum           oldon,
 472                                 oldoff;
 473         Datum           newon,
 474                                 newoff;
 475         Datum      *cvals;                      /* column values */
 476         char       *cnulls;                     /* column nulls */
 477         char       *relname;            /* triggered relation name */
 478         Relation        rel;                    /* triggered relation */
 479         HeapTuple       trigtuple;
 480         HeapTuple       newtuple = NULL;
 481         HeapTuple       rettuple;
 482         TupleDesc       tupdesc;                /* tuple description */
 483         int                     natts;                  /* # of attributes */
 484         bool            isnull;                 /* to know is some column NULL or not */
 485         int                     ret;
 486         int                     i;
 487
 488         if (!CALLED_AS_TRIGGER(fcinfo))
 489                 elog(ERROR, "ttdummy: not fired by trigger manager");
 490         if (!TRIGGER_FIRED_FOR_ROW(trigdata->tg_event))
 491                 elog(ERROR, "ttdummy: must be fired for row");
 492         if (!TRIGGER_FIRED_BEFORE(trigdata->tg_event))
 493                 elog(ERROR, "ttdummy: must be fired before event");
 494         if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
 495                 elog(ERROR, "ttdummy: cannot process INSERT event");
 496         if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
 497                 newtuple = trigdata->tg_newtuple;
 498
 499         trigtuple = trigdata->tg_trigtuple;
 500
 501         rel = trigdata->tg_relation;
 502         relname = SPI_getrelname(rel);
 503
 504         /* check if TT is OFF for this relation */
 505         if (ttoff)                                      /* OFF - nothing to do */
 506         {
 507                 pfree(relname);
 508                 return PointerGetDatum((newtuple != NULL) ? newtuple : trigtuple);
 509         }
 510
 511         trigger = trigdata->tg_trigger;
 512
 513         if (trigger->tgnargs != 2)
 514                 elog(ERROR, "ttdummy (%s): invalid (!= 2) number of arguments %d",
 515                          relname, trigger->tgnargs);
 516
 517         args = trigger->tgargs;
 518         tupdesc = rel->rd_att;
 519         natts = tupdesc->natts;
 520
 521         for (i = 0; i < 2; i++)
 522         {
 523                 attnum[i] = SPI_fnumber(tupdesc, args[i]);
 524                 if (attnum[i] < 0)
 525                         elog(ERROR, "ttdummy (%s): there is no attribute %s", relname, args[i]);
 526                 if (SPI_gettypeid(tupdesc, attnum[i]) != INT4OID)
 527                         elog(ERROR, "ttdummy (%s): attributes %s and %s must be of abstime type",
 528                                  relname, args[0], args[1]);
 529         }
 530
 531         oldon = SPI_getbinval(trigtuple, tupdesc, attnum[0], &isnull);
 532         if (isnull)
 533                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 534
 535         oldoff = SPI_getbinval(trigtuple, tupdesc, attnum[1], &isnull);
 536         if (isnull)
 537                 elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 538
 539         if (newtuple != NULL)           /* UPDATE */
 540         {
 541                 newon = SPI_getbinval(newtuple, tupdesc, attnum[0], &isnull);
 542                 if (isnull)
 543                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[0]);
 544                 newoff = SPI_getbinval(newtuple, tupdesc, attnum[1], &isnull);
 545                 if (isnull)
 546                         elog(ERROR, "ttdummy (%s): %s must be NOT NULL", relname, args[1]);
 547
 548                 if (oldon != newon || oldoff != newoff)
 549                         elog(ERROR, "ttdummy (%s): you cannot change %s and/or %s columns (use set_ttdummy)",
 550                                  relname, args[0], args[1]);
 551
 552                 if (newoff != TTDUMMY_INFINITY)
 553                 {
 554                         pfree(relname);         /* allocated in upper executor context */
 555                         return PointerGetDatum(NULL);
 556                 }
 557         }
 558         else if (oldoff != TTDUMMY_INFINITY)            /* DELETE */
 559         {
 560                 pfree(relname);
 561                 return PointerGetDatum(NULL);
 562         }
 563
 564         newoff = DirectFunctionCall1(nextval, CStringGetTextDatum("ttdummy_seq"));
 565         /* nextval now returns int64; coerce down to int32 */
 566         newoff = Int32GetDatum((int32) DatumGetInt64(newoff));
 567
 568         /* Connect to SPI manager */
 569         if ((ret = SPI_connect()) < 0)
 570                 elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
 571
 572         /* Fetch tuple values and nulls */
 573         cvals = (Datum *) palloc(natts * sizeof(Datum));
 574         cnulls = (char *) palloc(natts * sizeof(char));
 575         for (i = 0; i < natts; i++)
 576         {
 577                 cvals[i] = SPI_getbinval((newtuple != NULL) ? newtuple : trigtuple,
 578                                                                  tupdesc, i + 1, &isnull);
 579                 cnulls[i] = (isnull) ? 'n' : ' ';
 580         }
 581
 582         /* change date column(s) */
 583         if (newtuple)                           /* UPDATE */
 584         {
 585                 cvals[attnum[0] - 1] = newoff;  /* start_date eq current date */
 586                 cnulls[attnum[0] - 1] = ' ';
 587                 cvals[attnum[1] - 1] = TTDUMMY_INFINITY;                /* stop_date eq INFINITY */
 588                 cnulls[attnum[1] - 1] = ' ';
 589         }
 590         else
 591                 /* DELETE */
 592         {
 593                 cvals[attnum[1] - 1] = newoff;  /* stop_date eq current date */
 594                 cnulls[attnum[1] - 1] = ' ';
 595         }
 596
 597         /* if there is no plan ... */
 598         if (splan == NULL)
 599         {
 600                 SPIPlanPtr      pplan;
 601                 Oid                *ctypes;
 602                 char       *query;
 603
 604                 /* allocate space in preparation */
 605                 ctypes = (Oid *) palloc(natts * sizeof(Oid));
 606                 query = (char *) palloc(100 + 16 * natts);
 607
 608                 /*
 609                  * Construct query: INSERT INTO _relation_ VALUES ($1, ...)
 610                  */
 611                 sprintf(query, "INSERT INTO %s VALUES (", relname);
 612                 for (i = 1; i <= natts; i++)
 613                 {
 614                         sprintf(query + strlen(query), "$%d%s",
 615                                         i, (i < natts) ? ", " : ")");
 616                         ctypes[i - 1] = SPI_gettypeid(tupdesc, i);
 617                 }
 618
 619                 /* Prepare plan for query */
 620                 pplan = SPI_prepare(query, natts, ctypes);
 621                 if (pplan == NULL)
 622                         elog(ERROR, "ttdummy (%s): SPI_prepare returned %d", relname, SPI_result);
 623
 624                 pplan = SPI_saveplan(pplan);
 625                 if (pplan == NULL)
 626                         elog(ERROR, "ttdummy (%s): SPI_saveplan returned %d", relname, SPI_result);
 627
 628                 splan = pplan;
 629         }
 630
 631         ret = SPI_execp(splan, cvals, cnulls, 0);
 632
 633         if (ret < 0)
 634                 elog(ERROR, "ttdummy (%s): SPI_execp returned %d", relname, ret);
 635
 636         /* Tuple to return to upper Executor ... */
 637         if (newtuple)                           /* UPDATE */
 638         {
 639                 HeapTuple       tmptuple;
 640
 641                 tmptuple = SPI_copytuple(trigtuple);
 642                 rettuple = SPI_modifytuple(rel, tmptuple, 1, &(attnum[1]), &newoff, NULL);
 643                 SPI_freetuple(tmptuple);
 644         }
 645         else
 646                 /* DELETE */
 647                 rettuple = trigtuple;
 648
 649         SPI_finish();                           /* don't forget say Bye to SPI mgr */
 650
 651         pfree(relname);
 652
 653         return PointerGetDatum(rettuple);
 654 }
 655
 656 PG_FUNCTION_INFO_V1(set_ttdummy);
 657
 658 Datum
 659 set_ttdummy(PG_FUNCTION_ARGS)
 660 {
 661         int32           on = PG_GETARG_INT32(0);
 662
 663         if (ttoff)                                      /* OFF currently */
 664         {
 665                 if (on == 0)
 666                         PG_RETURN_INT32(0);
 667
 668                 /* turn ON */
 669                 ttoff = false;
 670                 PG_RETURN_INT32(0);
 671         }
 672
 673         /* ON currently */
 674         if (on != 0)
 675                 PG_RETURN_INT32(1);
 676
 677         /* turn OFF */
 678         ttoff = true;
 679
 680         PG_RETURN_INT32(1);
 681 }
 682
 683
 684 /*
 685  * Type int44 has no real-world use, but the regression tests use it.
 686  * It's a four-element vector of int4's.
 687  */
 688
 689 /*
 690  *              int44in                 - converts "num num ..." to internal form
 691  *
 692  *              Note: Fills any missing positions with zeroes.
 693  */
 694 PG_FUNCTION_INFO_V1(int44in);
 695
 696 Datum
 697 int44in(PG_FUNCTION_ARGS)
 698 {
 699         char       *input_string = PG_GETARG_CSTRING(0);
 700         int32      *result = (int32 *) palloc(4 * sizeof(int32));
 701         int                     i;
 702
 703         i = sscanf(input_string,
 704                            "%d, %d, %d, %d",
 705                            &result[0],
 706                            &result[1],
 707                            &result[2],
 708                            &result[3]);
 709         while (i < 4)
 710                 result[i++] = 0;
 711
 712         PG_RETURN_POINTER(result);
 713 }
 714
 715 /*
 716  *              int44out                - converts internal form to "num num ..."
 717  */
 718 PG_FUNCTION_INFO_V1(int44out);
 719
 720 Datum
 721 int44out(PG_FUNCTION_ARGS)
 722 {
 723         int32      *an_array = (int32 *) PG_GETARG_POINTER(0);
 724         char       *result = (char *) palloc(16 * 4);           /* Allow 14 digits +
 725                                                                                                                  * sign */
 726         int                     i;
 727         char       *walk;
 728
 729         walk = result;
 730         for (i = 0; i < 4; i++)
 731         {
 732                 pg_ltoa(an_array[i], walk);
 733                 while (*++walk != '\0')
 734                         ;
 735                 *walk++ = ' ';
 736         }
 737         *--walk = '\0';
 738         PG_RETURN_CSTRING(result);
 739 }